







The wall through conduit, also known as a wall through pipe, waterproof conduit, or wall embedded pipe, is an indispensable hardware fitting or insulation support component that ensures the seamless passage of pipelines through walls. This essential component finds extensive application in construction and electrical domains. Delve into the classification, structure, purpose, and selection criteria of this versatile conduit:
Exploring Classification and Characteristics
• Classification based on waterproofing and various usage scenarios
Rigid waterproof sleeve: Engineered from robust thick-walled steel pipe paired with a wing ring (a circular steel plate affixed to the pipe), this sleeve boasts high strength and rigidity. It adeptly withstands tremendous pressure and tension, maintaining its form without deformation or breakage, thereby offering exceptional protection to pipelines. Its thoughtful material and structural composition endow it with superior waterproof qualities, shielding against moisture and rainwater while exhibiting formidable corrosion resistance against harsh environments and chemical erosion. Ideal for basements and other areas demanding waterproofing where pipelines are exempt from vibration or expansion-induced deformation. For instance, in a building's basement, these sleeves prevent groundwater infiltration through the walls.
Flexible waterproof conduit: Featuring exterior wing rings and interior components like retaining rings and flange threads, this conduit is tailored for structures where pipelines penetrate walls subjected to vibration or requiring stringent waterproofing. It's perfect for civil defense walls, water tanks, water pump rooms, etc. For example, pipelines passing through a sewage treatment plant's water tank wall not only need to prevent leakage but also accommodate operational vibrations.
• Classification based on material and intended purpose
Ceramic insulated AC wall bushing (porcelain bushing): This bushing, constructed from ceramic parts, mounting flanges, and conductors, is a staple in the power sector. Its purpose is to insulate and support conductive components traversing walls or other grounded structures.
Dry type capacitive AC wall bushing (silicone rubber bushing): Eminently modern with no oil, gas, or porcelain, this compact, lightweight bushing demands minimal maintenance. It's fire-resistant, explosion-proof, and fitted with precision through-type current transformers. Its uniform voltage distribution along the surface is enhanced by utilizing silicone rubber for external insulation, further elevating its pollution flashover voltage.
Delving into Structure
Generally assembled from ceramic parts, mounting flanges, and conductors (in conductive through-wall sleeves), these busbar through-wall conduits lack conductive components. While certain products opt for mechanical clamping, the prevalent method for fixing porcelain sleeves and flanges employs cement adhesive; Copper conductors secure via centering washers and nuts, whereas copper and aluminum conductors use centering washers and open pins. To enhance initial corona, some voltage levels (20, 35kV) of the bushing incorporate uniform voltage measures, such as augmenting or thickening the porcelain wall and umbrella (edge) near the flange, applying semiconductor glaze to certain porcelain parts, and baking them to improve electric field distribution.
Broad Purpose
In architecture, these conduits are paramount in safeguarding pipelines traversing walls while satisfying waterproofing, vibration reduction, and other crucial requirements. They preserve the structural integrity of buildings and ensure the unimpeded functionality of pipeline systems. Their utility spans an array of building plumbing, fire protection, ventilation, and other pipeline engineering applications.
In the electrical realm, these conduits are vital in power plants, substations, distribution equipment, and high-voltage electrical appliances. They facilitate the safe passage of conductive components through walls or grounded objects, offering insulation and support to maintain the safety and reliability of power transmission systems.
Essential Selection Points
• Type and pattern choice: Select indoor or outdoor types based on installation location; Opt for wall conduits with conductors or busbar-type wall conduits without conductors depending on the intended application.